<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card class="box-card">
      <el-row>
        <el-col>
          <el-button
            type="primary"
            @click="showAddCateDialog"
          >添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格区域 -->
      <zk-table
        class="zk-table"
        ref="table"
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        :show-index="true"
        index-text="#"
        border
      >
        <!-- 是否有效 -->
        <template
          slot="isok"
          slot-scope="scope"
        >
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted==false"
            style="color:lightgreen"
          ></i>
          <i
            class="el-icon-error"
            v-else
            style="color:red"
          ></i>
        </template>
        <!-- 排序 -->
        <template
          slot="order"
          slot-scope="scope"
        >
          <el-tag
            size="mini"
            v-if="scope.row.cat_level===0"
          >一级</el-tag>
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level===1"
          >二级</el-tag>
          <el-tag
            size="mini"
            type="warning"
            v-else
          >三级</el-tag>
        </template>
        <!-- 操作 -->
        <template
          slot="opt"
          scope
        >
          <el-button
            size="mini"
            type="primary"
            icon="el-icon-edit"
          >编辑</el-button>
          <el-button
            size="mini"
            type="danger"
            icon="el-icon-delete"
          >删除</el-button>
        </template>
      </zk-table>
      <!-- 分页区域 -->
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>
    <!-- 添加分类的对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!-- 添加分类的表单 -->
      <el-form
        :model="addCateForm"
        :rules="addCateForm_rules"
        ref="addCateForm_ref"
        label-width="100px"
      >
        <el-form-item
          label="分类名称："
          prop="cat_name"
        >
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类：">
          <!-- 级联选择器 -->
          <!-- options数据源 -->
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCatChange"
            clearable
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="confirmAddCate"
        >确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import categories_1 from '../../dataSource/categories_1'
export default {
  created() {
    this.getCateList();
  },
  data() {
    return {
      // 商品分类的数据列表
      cateList: [],
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      // 总数居条数
      total: 0,
      // 表格各列的配置
      columns: [
        {
          label: "分类名称",
          prop: "cat_name"
        },
        {
          label: "是否有效",
          // 将当前列定义为模板列
          type: "template",
          template: "isok"
        },
        {
          label: "排序",
          type: "template",
          template: "order"
        },
        {
          label: "操作",
          type: "template",
          template: "opt"
        }
      ],
      //   添加分类对话框的显示隐藏
      addCateDialogVisible: false,
      //   添加分类的表单数据
      addCateForm: {
        cat_name: "",
        // 父级分类的id
        cat_pid: "",
        // 分类的等级
        cat_level: 0
      },
      // 验证添加分类表单的规则
      addCateForm_rules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ]
      },
      //   父级分类的列表数据
      parentCateList: [],
      //   级联选择器的配置对象
      cascaderProps: {
        expandTrigger: "hover",
        value: 'cat_id',
        label: "cat_name",
        children: "children",
        checkStrictly: true,
      },
    //   选中父级分类id数组
      selectedKeys:[],
    };
  },
  methods: {
    // 获取商品分类数据
    async getCateList() {
      // const { data: res } = await this.$http.get("categories", {
      //   params: this.queryInfo
      // });
      const { data: res } = categories_1;
      // if (res.meta.status !== 200) {
      //   return this.$message.error("获取商品分类失败");
      // }
      this.cateList = res.result;
      this.total = res.total;
    },
    // 监听pagesize改变
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    // 监听pagenum的改变
    handleCurrentChange(newpage) {
      this.queryInfo.pagenum = newpage;
      this.getCateList();
    },
    // 点击添加分类的按钮
    showAddCateDialog() {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },
    // 获取父级分类的数据列表
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: {
          type: 2
        }
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取父级分类数据失败");
      }
      this.parentCateList = res.data;
    },
    // 级联选择器选择项变化触发
    parentCatChange(){
      // 如果selectedKeys数组中的length大于0，说明选中的父级分类
      // 反之，说明没有选中任何父级分类
      if(this.selectedKeys.length>0){
       this.addCateForm.cat_pid= this.selectedKeys[this.selectedKeys.length-1];
       this.addCateForm.cat_level=this.selectedKeys.length;
       return;
      }else{
         this.addCateForm.cat_pid=0;
         this.addCateForm.cat_level=0;
      }

    },
    // 点击添加分类对话框的确定按钮
    confirmAddCate(){
      this.$refs.addCateForm_ref.validate(async valid=>{
        if(!valid){
          return;
        }else{
           const {data:res}=await this.$http.post('categories',this.addCateForm);
           if (res.meta.status !== 201) {
               return this.$message.error("添加分类失败")
             }
             this.$message.success("添加分类成功");
             this.getCateList();
             this.addCateDialogVisible = false;
        }
      })
    },
    // 对话框关闭时触发
    addCateDialogClosed(){
      this.$refs.addCateForm_ref.resetFields();
      this.selectedKeys=[];
      this.addCateForm.cat_pid=0;
         this.addCateForm.cat_level=0;
    }
  }
};
</script>

<style lang="less" scoped>
.zk-table {
  margin-top: 15px;
}
.el-cascader{
    width: 100%;
}
</style>

